<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
  <script>
      var sum = 0;
      for(var i = 0;i <= 100;i ++){
         sum += i;  //sum = sum + i;
      }
      console.log("sum = "+ sum);
      for(var i = 0;i < 5;i ++){
          for(var j = 0;j < 5;j ++){
              document.write("*");
          }
          document.write("<br>");
      }
  </script>
</body>
</html>